Hydraulic system for backhoe

Details Hydraulic system for backhoe Hydraulic system for backhoe

1994-12-02

1995-12-05

Look, Edward K.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91532, 60424, 60426, F15B 1100, F16D 3102

Patent

active

054719089

ABSTRACT:
Disclosed is a hydraulic system for a machine having a pump, a steering circuit and first and second hydraulic implements, e.g., a hydraulic loader and a backhoe, powered by first and second valve sections, respectively. In the improvement, the system includes a priority valve receiving fluid from the pump and configured for movement between a first position and a second position. In the first position, the priority valve flows fluid to the steering circuit and to the second valve section and in the second position, the priority valve flows fluid to the both valve sections which are connected in series.

REFERENCES:
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patent: 3624785 (1971-11-01), Wilson
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patent: 4184560 (1980-01-01), Tischer
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patent: 4635439 (1987-01-01), Wible
patent: 4815357 (1989-03-01), Truehart
patent: 4966066 (1990-10-01), Kauss et al.
patent: 5048293 (1991-09-01), Aoyagi
patent: 5072802 (1991-12-01), Tischer
patent: 5313795 (1994-05-01), Dunn

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